AVR32 is a high-performance 32-bit RISC microprocessor core, designed for cost-sensitive embedded applications, with particular emphasis on low power consumption, high code density and high performance. The processor implements a Memory Protection Unit (MPU) and a fast and flexible interrupt controller for supporting modern operating systems and real-time operating systems. Higher computation capabilities are achievable using a rich set of DSP instructions.
To fully exploit the power of a 32-bit architecture, the AVR32 is not binary compatible with earlier AVR architectures. In order to achieve high code density, the instruction format is flexible providing both compact 16-bit and extended 32-bit instructions. While most instructions are 16-bit, powerful 32-bit instructions are implemented to further increase performance. Compact and extended instructions can be freely mixed in the instruction stream.

The Microchip AT32UC3A3/A4 32-bit System-On-Chip microcontroller is based on the AVR32 UC RISC processor running at frequencies up to 84MHz. It operates on single 3.3V power supply. The processor implements a Memory Protection Unit (MPU) and a fast and flexible interrupt controller for supporting modern operating systems and real-time operating systems. It incorporates on-chip Flash and SRAM memories for secure and fast access. The Peripheral Direct Memory Access Controller (PDCA) enables data transfers between peripherals and memories without processor involvement, also drastically reduces processing overhead when transferring continuous and large data streams. It features many communication interfaces for communication intensive applications like UART, SPI or TWI. The USART supports different communication modes, like SPI Mode and LIN Mode. Additionally, a flexible Synchronous Serial Controller (SSC) is available. The SSC provides easy access to serial communication protocols and audio standards like I2S.

Performing up to 1.51DMIPS/MHz
Memory Protection Unit
Internal High-Speed Flash of 256 Kbytes
64KBytes Single-Cycle Access at Full Speed, Connected to CPU Local Bus
Flash Security Locks and User Defined Configuration Area
Auto vectored Low Latency Interrupt Service with Programmable Priority
One Synchronous Serial Protocol Controller
Integrates Nexus Class 2+, Runtime Control, Non-Intrusive Data and Program Trace
Package type is 144-pin LQFP, 22x22 mm, pitch 0.5 mm